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NAS.VSS Report - 1994 September
- Date: Wed Oct 5 07:26:48 1994
- To: varstars@nic.funet.fi, vsnet-obs@kusastro.kyoto-u.ac.jp
- From: b.h.granslo@astro.uio.no
- Subject: NAS.VSS Report - 1994 September
Norwegian Astronomical Society - Variable Star Section
***** OBSERVATIONS OF VARIABLE STARS - REPORT OF 1994 OCTOBER 4 *****
This report contains selected visual observations by members of NAS.VSS
since 1994 September 1. Time system is Universal Time (date with desi-
mals). Contributing observers:
Abbr. Observer Address Instruments
GRL Granslo, Bjorn H. Fjellhamar, Norway C203, B7x35
LVA Lauvstad, Andreas Levanger, Norway M152, B7x50, L6x30
1. NOVAE AND RECURRENT NOVAE
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Variable 1994 UT Magn Obs 1994 UT Magn Obs 1994 UT Magn Obs
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V705 Cas Sep 2.867 12.3 LVA Sep 3.949 12.1 LVA Sep 4.913 12.2 LVA
V705 Cas Sep 7.885 12.1 LVA Sep 10.923 12.1 LVA Sep 11.946 12.1 GRL
V705 Cas Sep 14.902 12.1 LVA Sep 17.838 12.2 LVA Sep 18.102 12.1 GRL
V705 Cas Sep 18.897 12.1 GRL Sep 20.854 12.2 LVA Sep 20.892 12.1 GRL
V705 Cas Sep 24.842 12.1 GRL Sep 27.910 12.2 GRL Sep 29.807 12.2 GRL
V705 Cas Oct 1.003 12.2 GRL Oct 1.968 12.2 LVA
T CrB Sep 20.90 10.4 GRL Sep 24.83 10.4 GRL Sep 29.80 10.4 GRL
RS Oph Sep 24.85 11.2 GRL Sep 29.83 11.6 GRL
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V705 Cassiopeiae (Nova 1993) has apparently reached its secondary maximum
as it has remained near mag. 12 since July. The recurrent novae T Coronae
Borealis and RS Ophiuchi were seen near minimum.
2. DWARF NOVAE
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Variable 1994 UT Magn Obs 1994 UT Magn Obs 1994 UT Magn Obs
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RX And Sep 2.93 10.8 LVA Sep 3.86 10.9 LVA Sep 4.93 12.2 LVA
RX And Sep 7.89 13.6 LVA Sep 7.93 <13.3 GRL Sep 11.96 <12.7 GRL
RX And Sep 18.98 10.8 GRL Sep 20.90 10.8 GRL Sep 24.85 <13.1 GRL
RX And Oct 1.01 <13.3 GRL
DX And Sep 27.88 11.5 GRL Sep 29.80 11.4 GRL Oct 1.00 11.7 GRL
SS Aur Sep 18.97 <12.5 GRL Oct 1.01 <13.2 GRL
Z Cam Sep 2.90 13.2 LVA Sep 3.88 13.3 LVA Sep 4.92 13.2 LVA
Z Cam Sep 7.89 10.5 LVA Sep 10.92 11.7 LVA Sep 11.94 10.7 GRL
Z Cam Sep 14.90 10.3 LVA Sep 17.88 11.2 LVA Sep 18.90 10.7 GRL
Z Cam Sep 20.85 11.4 LVA Sep 20.89 11.0 GRL Sep 24.84 12.9 GRL
Z Cam Sep 24.91 <12.5 LVA Sep 27.91 13.2 GRL Oct 1.01 13.2 GRL
SS Cyg Sep 2.85 8.3 LVA Sep 2.92 8.3 LVA Sep 2.96 8.3 LVA
SS Cyg Sep 3.86 8.3 LVA Sep 4.86 8.4 LVA Sep 7.87 8.3 LVA
SS Cyg Sep 7.88 8.6 GRL Sep 10.92 10.3 LVA Sep 11.94 10.5 GRL
SS Cyg Sep 14.90 12.1 LVA Sep 17.88 12.0 LVA Sep 18.11 12.0 GRL
SS Cyg Sep 18.90 12.0 GRL Sep 20.85 12.1 LVA Sep 20.89 12.2 GRL
SS Cyg Sep 24.83 12.1 GRL Sep 24.91 12.5 LVA Sep 27.88 12.1 GRL
SS Cyg Sep 29.80 12.1 GRL Oct 1.00 12.1 GRL
RU Peg Sep 7.92 12.6 GRL Sep 11.94 12.6 GRL Sep 27.89 11.4 GRL
RU Peg Oct 1.00 11.5 GRL
IP Peg Sep 2.864 12.7 LVA Sep 2.888 12.2 LVA Sep 2.907 13.8 LVA
IP Peg Sep 2.911<13.8 LVA Sep 2.920 12.7 LVA Sep 4.880 12.2: LVA
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The following objects were detected in outburst: RX Andromedae (two maxima),
DX Andromedae, Z Camelopardalis, SS Cygni, RU Pegasi and IP Pegasi (an
eclipse was detected by A. Lauvstad around Sep 2.91 UT).
3. OTHER ERUPTIVE VARIABLES
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Variable 1994 UT Magn Obs 1994 UT Magn Obs 1994 UT Magn Obs
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EG And Sep 11.90 7.4 GRL Sep 18.97 7.5 GRL Sep 20.91 7.5 GRL
EG And Sep 24.85 7.5 GRL Oct 1.01 7.5 GRL Sep 2.92 7.6 LVA
EG And Sep 10.93 7.5 LVA
AE Aqr Sep 7.94 11.2 GRL Sep 18.91 10.7 GRL Sep 20.90 11.3 GRL
AE Aqr Sep 24.83 11.3 GRL Sep 27.89 11.2 GRL Sep 29.83 11.2 GRL
TT Ari Sep 7.93 10.3 GRL Sep 18.10 10.5 GRL Sep 27.90 10.3 GRL
TT Ari Oct 1.01 10.5 GRL
UV Cas Sep 2.91 10.7 LVA Sep 10.92 10.7 LVA Sep 11.96 10.8 GRL
UV Cas Sep 20.88 10.6 LVA
R CrB Sep 7.87 5.9 GRL Sep 11.88 6.0 GRL Sep 18.89 5.9 GRL
R CrB Sep 24.82 5.9 GRL Sep 27.88 5.9 GRL Sep 17.83 5.9 LVA
BF Cyg Sep 2.93 12.0 LVA Sep 7.94 11.5 GRL Sep 17.83 12.2 LVA
BF Cyg Sep 18.91 11.7 GRL Sep 20.90 11.6 GRL
CH Cyg Sep 2.93 7.9 LVA Sep 7.92 7.3 GRL Sep 11.96 7.3 GRL
CH Cyg Sep 18.12 7.8 GRL Sep 20.86 7.5 LVA Sep 20.90 7.8 GRL
CH Cyg Sep 24.85 7.9 GRL Sep 29.80 8.0 GRL
V482 Cyg Sep 3.88 10.9 LVA Sep 7.94 11.0 GRL Sep 18.91 10.9 GRL
V482 Cyg Sep 20.87 10.7 LVA Sep 20.90 10.9 GRL
AG Dra Sep 4.919 8.7 LVA Sep 7.92 8.7 GRL Sep 14.908 8.5 LVA
AG Dra Sep 18.12 8.9 GRL Sep 20.858 8.5 LVA Sep 24.84 8.8 GRL
AG Dra Sep 29.80 9.0 GRL
AG Peg Sep 7.92 8.8 GRL Sep 11.94 8.9 GRL Sep 18.92 8.9 GRL
AG Peg Sep 20.90 9.0 GRL Sep 27.89 9.0 GRL Oct 1.00 8.9 GRL
X Per Sep 11.88 6.3 GRL Sep 18.09 6.2 GRL
AX Per Sep 11.95 12.2 GRL Sep 20.91 12.1 GRL Sep 24.85 12.2 GRL
AX Per Sep 29.81 12.0 GRL
V Sge Sep 4.88 10.0 LVA Sep 7.88 11.1 LVA Sep 18.91 10.7 GRL
V Sge Sep 20.90 10.2 GRL Sep 27.92 10.7 GRL
FG Sge Sep 18.91 <12.5 GRL Sep 27.92 <12.5 GRL
HM Sge Sep 18.91 11.2 GRL Sep 20.90 11.2 GRL Sep 27.91 11.2 GRL
RR Tau Sep 18.97 10.6 GRL Oct 1.02 11.4 GRL
RY Tau Sep 18.97 11.1 GRL Oct 1.01 10.9 GRL
SU Tau Sep 18.09 12.0 GRL Oct 1.01 11.6 GRL
BU Tau Sep 2.92 5.5 LVA Sep 7.90 5.3 LVA Sep 11.88 5.1 GRL
BU Tau Sep 14.92 5.3 LVA Sep 18.09 5.1 GRL
WW Vul Sep 18.91 10.7 GRL Sep 20.90 10.7 GRL Sep 27.91 10.6 GRL
PU Vul Sep 7.88 11.5 LVA Sep 18.91 11.7 GRL Sep 20.90 11.7 GRL
PU Vul Sep 27.92 11.6 GRL
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The nova-like variable AE Aquarii was seen unusually bright on Sep 18.91 UT
(class 1 observation). SU Tauri is slowly recovering from its deep minimum,
while the other RCB-objects (R Coronae Borealis itself, UV Cassiopeiae and
V482 Cygni) were seen near maximum. Several symbiotic stars (type ZAND)
have shown interesting activity. AX Persei was detected in an eclipse,
about 0.5 magnitudes fainter than its normal minimum magnitude. Its orbital
period is 681.6 days (Kenyon, S.J. 1982, Pub. Astr. Soc. Pac., 94, 165).
AG Draconis has faded somewhat since July, but it is still well above its
normal brightness (observations by undersigned is based on comparison stars
with photoelectric V-magnitudes from Hipparcos Input Catalogue). CH Cygni
has shown clear variations during September. The central star of the plane-
tary nebula PK 60-7.1 (FG Sagittae) has shown R CrB-like variations since
the autumn of 1992 and it is still very faint.
4. PULSATING VARIABLES
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Variable 1994 UT Magn Obs 1994 UT Magn Obs 1994 UT Magn Obs
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V Aql Sep 18.90 7.6 GRL Sep 24.83 7.5 GRL Sep 29.83 7.5 GRL
T Cas Sep 2.89 10.8 LVA Sep 10.93 10.8 LVA Sep 11.95 10.9 GRL
T Cas Sep 20.88 10.7 LVA
W Cas Sep 2.89 11.0 LVA Sep 11.95 11.3 GRL Sep 14.91 11.2 LVA
T Cep Sep 18.11 9.8 GRL Oct 1.01 9.3 GRL
Omicr Cet Sep 11.97 7.2 GRL Sep 18.11 7.3 GRL
RS Cyg Sep 7.94 8.9 GRL Sep 18.93 9.0 GRL
RU Cyg Sep 7.94 8.4 GRL Sep 18.93 8.5 GRL
RV Cyg Sep 7.92 9.3 GRL Sep 18.93 9.1 GRL
TZ Cyg Sep 2.93 11.2 LVA Sep 20.86 11.0 LVA
AF Cyg Sep 2.93 7.2 LVA Sep 7.88 7.3 LVA Sep 7.92 7.6 GRL
AF Cyg Sep 18.12 7.6 GRL Sep 20.86 7.4 LVA
Chi Cyg Sep 7.94 10.8 GRL Sep 18.91 11.6 GRL
S CrB Sep 24.85 7.8 GRL Sep 29.82 7.6 GRL
W Lyr Sep 7.92 9.3 GRL Sep 18.91 8.8 GRL Sep 24.85 8.4 GRL
U Ori Sep 18.09 10.1 GRL Oct 1.01 8.5 GRL
TX Per Sep 11.96 11.5 GRL Sep 18.97 11.4 GRL
R Sge Sep 3.87 9.9 LVA Sep 18.91 9.1 GRL Sep 20.88 9.2 LVA
R Sge Sep 27.89 9.3 GRL
R Sct Sep 7.87 6.4 GRL Sep 11.88 6.0 GRL Sep 18.89 6.5 GRL
R Sct Sep 24.83 7.2 GRL Sep 27.88 7.5 GRL Sep 29.83 7.4 GRL
S Sct Sep 18.90 7.8 GRL Sep 24.83 7.9 GRL Sep 29.83 7.8 GRL
R Tri Sep 11.96 11.1 GRL Sep 18.97 11.3 GRL
R UMi Sep 18.93 9.7 GRL Sep 27.91 9.8 GRL
S UMi Sep 18.93 10.8 GRL Sep 27.91 11.5 GRL
V UMi Sep 18.93 8.1 GRL Sep 27.91 8.1 GRL
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R Scuti, the famous RV Tauri variable, faded to a primary minimum in late
September and early October, but it was not as faint than during the first
half of May this year. Another RV-star, TX Persei, was also faint in Septem-
ber. The long-periodic stars Omicron Ceti (Mira), Chi Cygni and S Ursae Mi-
noris are fading, while T Cephei, S Coronae Borealis, W Lyrae and U Orionis
are brightening. Our group has started to observe some little studied stars
and we have prepared charts based on the Guide Star Catalog.
Yours sincerely,
Bjorn H. Granslo
Director, NAS.VSS